invlogit | R Documentation |
Inverse-logit function, transforms continuous values to the range (0, 1)
logit(x)
invlogit(x)
x |
A vector of continuous values |
The Inverse-logit function defined as:
logit^-1(x) = e^x/(1+e^x)
transforms continuous values to the range (0, 1),
which is necessary, since probabilities must be between 0 and 1 and maps
from the linear predictor to the probabilities
A vector of estimated probabilities
Andrew Gelman gelman@stat.columbia.edu, M.Grazia Pittau grazia@stat.columbia.edu
Andrew Gelman and Jennifer Hill. (2006). Data Analysis Using Regression and Multilevel/Hierarchical Models. Cambridge University Press.
data(frisk)
n <- 100
x1 <- rnorm (n)
x2 <- rbinom (n, 1, .5)
b0 <- 1
b1 <- 1.5
b2 <- 2
Inv.logit <- invlogit(b0+b1*x1+b2*x2)
plot(b0+b1*x1+b2*x2, Inv.logit)
Add the following code to your website.
For more information on customizing the embed code, read Embedding Snippets.